Sectional electrical bus bar



Dec. 30,1930.` D. FL DAvlEs y f 1,786,830

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ATTORNEY Patented Dec. 30, 1930 UNITED STATES ,PATENT or-'l-lca" DAVID REGINALD DAVIES, OF DIDSBURY, ENGLAND, `ASSIGNOB T0 WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION 0F PENNSYLVANIA SECTIONAL ELECTRICAL BUS BAB Application led March?, 1927, Serial No. 178,296, and in Great Britain latch 28, 1826.

My invention relates to sectional electrical bus-bars of the typein which the various sections are enclosed in metal casings or chambers filled with insulating material.

One object of the invention is to provide improved arrangements for coupling or connecting together the various bus-bar sections whereby an additional section may be readily connected tov an existing bus-bar system andv in some cases the improved coupling arrangements are adapted to provide a. simple means for connecting either incoming or outgoing feeders to the bus-bar conductors.

According` to the invention the various sections of conductor forming the bus-bars are provided at their ends with leads or lugs which project through the casing containing the section and said leads are provided with terminals of any suitable description by means of which adjacent leads may be connected together by a link so as to couple one bus-bar section to the next. The link and projecting leads and terminals are enclosed in a coupling box removably attached to the adjacent bus-bar chambers and arranged tc be filled with insulating liquid, a suitabletube which may be furnished with an indicator showing the level of the liquid surj face and a sight feed device, being provided for the purpose of filling the box.

Instead of being liquid the insulatingfilling material may have at normal working temperatures a heavy vaseline like consistency provided it can readily be liquefied by a relatively small increase of temperature.

The single figure of the accompanying drawings is a view partially in elevation and partially in section of a bus-bar construction embodying my invention.

Referring to the drawing, the conductor l forming a bus-bar section is enclosed in a metal casing or chamber 2 filled with an insulating compound 3. To the ends of the conductor 1 are attached leads 4 encasedin rigid insulating members 5 which project through holes 6 in the under side of the casing 2, and are provided with terminals .7.

At each end of the chamber 2 the projecting lead 4 is connected to the corresponding lead of the adjacent bus chamber by a link 8, said link with the insulating members 5 and lead terminals 7k being enclosed in a coupling box 9 which is removably attached by oil-tight joints to the adjacent bus chambers 2, and is provided with a fillin tube 10 b means of which the coupling ox is lledywith insulating oil. The tube 10 has a. sight feed device` consisting of a glass vessel 11 at the top of the tube.

It will be obvious' that with this im roved arrangement the connection of ad itional bus-bar sections or disconnection of existing sections is a very simple matter, it being necessary only to draw off the liquid from the coupling box after which the box can be removed or opened and the link between the bus-bar sections disconnected. A box may be provided adapted to enclose the free projecting lead from the last bus-bar section so as to seal off the end of said section.

The connectin links and coupling boxes may be arrange on the undersides of the bus-bar sections or the leads may project upwardly from said sections and the cou lingboxes be arranged on the top and in the atter case the bus-bar chambers may be constituted by a tank of suitable dimensions to contain the section or sections removably attached to an upper plate forming the top of the chamber and the chambers may be filled with insulating liquid insteadl of with solid insulating material as is ordinarily the case. The coupling boxes must be arranged to form oiltight joints with the top plates of the busbar chambers. In some cases the top plates of adjacent bus-bar chambers may be connected by a single plate on the to of which a flanged coupling box may be bo ted so that an oiltight joint will bereadily obtained. Preferably, independent filling'arrangements are provided for the bus-bar chambers and coupling boxes in such case. Where each chamber contains one conductor only such conductormay projectthrough' the end of the casing and the junctions between the coupling box and the coupled chambers be eiected at cylindrical surfaces.

The conductors forming the bus-bars may be of bare metal or provided with a comparatively small amount of insulation.

The bus-bars forming a section for example the three sectional conductor bars in a threephase system, need not be contained in the same bus-bar chamber but separate chambers 5 may be provided for each phase conductor. With such arrangements the several ends of the chambers may be arranged in ste ped or staggered relation so that the incomlng and outgoing feeder leads will enter each busbar chamber at a similar osition with regard to the ends of the cham er and at the same time Will be spaced apart in correct relationship. Where the several chambers containing the bus-bars of a section terminate in the same lane a single coupling box may in some cases e pirovided for containing all the coupling lin s.

In some cases the connections of the incoming or outgoing feeders to the bus-bars may 2o be made through the links or terminals, said feeders being led into the coupling box by suitable bushings, thus avoiding the entry of the feeders into the bus-bar chambers.

It is to be understood that such changes in the form, arrangement, and connection of the component parts of my invention may be made as shall fall within the scope of the appended claims. Y

I claim as my invention:

1. A liquid-tight receptacle having a pair of insulated conductors extending through a Wall thereof and having link attaching means thereon, a bus bar within the receptacle connected to and supported on said conductors,

a connecting link for connecting one of said conductors to an ad'acent conductor of a similar receptacle an a liquid-tight recepta- V cle enclosing the link and the last said conductors.

40 2. A liquid-tight receptacle having a pair of insulated conductors mounted in a Wall thereof extending Within and Without said receptacle, a bus bar connected to the said conductors Within the receptacle, a second bus bar connected to one of said conductors exterior of said receptacle and to another c'onductor and a second receptacle enclosing the last said conductors and bus bar in a liquidi tight manner.

3. A plurality of liquid-tight receptacles each havin a pair of insulated conductors extending t rough a wall thereof, a bus bar 'in each of the receptacles supported on the said conductors and a plurality of conducting links connectinvr the conductors of adjacent receptacles to tterm a continuous circuit through said enclosed bus bars..

I n testimony whereof, I have hereunto subscrlbed my name this 15th day of February,

DAVID REG TNALD DAVIES. 

